The effect of the shape/size and distribution of microgeometries of textures on improving the tribo-performance of crankpin bearing is proposed. Based on a combined model of the slider-crank mechanism dynamic and hydrodynamic lubrication, the distribution density, area density, and shape of spherical textures, square-cylindrical textures, wedge-shaped textures, and a hybrid between spherical texture and square-cylindrical texture on the crankpin bearing's tribo-performance are investigated under different operating conditions of the engine. The tribological characteristic of the crankpin bearing is then evaluated via the indexes of the oil film pressure p, asperity contact force, friction force, and friction coefficient of the crankpin bearing. The research results show that the distribution density with n = 12 and m = 6, and area density with α = 30% of various microtextures have an obvious effect on ameliorating the crankpin bearings tribo-performance. Concurrently, at the mixed lubrication region, the shape of the square-cylindrical texture on improving the tribo-performance is better than the other shapes of the spherical texture, wedge-shaped texture, and spherical and square-cylindrical texture. Particularly, all the average values of the asperity contact force, friction force, and friction coefficient with a square-cylindrical texture are significantly reduced by 14.6%, 19.5%, and 34.5%, respectively, in comparison without microtextures. Therefore, the microtextures of the spherical texture applied on the bearing surface can contribute to enhance the durability and decrease the friction power loss of the engine.

提出了织构的形状/尺寸和微观几何形状的分布对改善曲柄销轴承摩擦性能的影响。基于滑块-曲柄机构动态和流体动力润滑的组合模型，球形纹理，方圆柱纹理，楔形纹理以及球形纹理和方圆柱纹理的混合体的分布密度，面积密度和形状研究了在发动机不同工况下曲柄轴承的摩擦性能。然后通过油膜压力p，粗糙接触力，摩擦力和曲柄轴承的摩擦系数来评估曲柄轴承的摩擦学特性。研究结果表明，分布密度随n  = 12且m  = 6，且区域密度为α = 30％的各种微观纹理对改善曲柄销轴承的摩擦性能具有明显的影响。同时，在混合润滑区域，改善摩擦性能的方圆柱纹理的形状优于球形纹理，楔形纹理以及球形和方圆柱纹理的其他形状。特别是，与没有微纹理的情况相比，具有正方形圆柱纹理的粗糙接触力，摩擦力和摩擦系数的所有平均值分别显着降低了14.6％，19.5％和34.5％。因此，施加在轴承表面上的球形纹理的微观纹理可以有助于提高耐用性并减少发动机的摩擦力损失。